LCOV - code coverage report
Current view: top level - libavformat - g723_1.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 25 27 92.6 %
Date: 2017-12-17 11:58:42 Functions: 2 2 100.0 %

          Line data    Source code
       1             : /*
       2             :  * G.723.1 demuxer
       3             :  * Copyright (c) 2010 Mohamed Naufal Basheer
       4             :  *
       5             :  * This file is part of FFmpeg.
       6             :  *
       7             :  * FFmpeg is free software; you can redistribute it and/or
       8             :  * modify it under the terms of the GNU Lesser General Public
       9             :  * License as published by the Free Software Foundation; either
      10             :  * version 2.1 of the License, or (at your option) any later version.
      11             :  *
      12             :  * FFmpeg is distributed in the hope that it will be useful,
      13             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      15             :  * Lesser General Public License for more details.
      16             :  *
      17             :  * You should have received a copy of the GNU Lesser General Public
      18             :  * License along with FFmpeg; if not, write to the Free Software
      19             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      20             :  */
      21             : 
      22             : /**
      23             :  * @file
      24             :  * G.723.1 demuxer
      25             :  */
      26             : 
      27             : #include "libavutil/attributes.h"
      28             : #include "libavutil/channel_layout.h"
      29             : #include "avformat.h"
      30             : #include "internal.h"
      31             : 
      32             : static const uint8_t frame_size[4] = { 24, 20, 4, 1 };
      33             : 
      34           9 : static av_cold int g723_1_init(AVFormatContext *s)
      35             : {
      36             :     AVStream *st;
      37             : 
      38           9 :     st = avformat_new_stream(s, NULL);
      39           9 :     if (!st)
      40           0 :         return AVERROR(ENOMEM);
      41             : 
      42           9 :     st->codecpar->codec_type     = AVMEDIA_TYPE_AUDIO;
      43           9 :     st->codecpar->codec_id       = AV_CODEC_ID_G723_1;
      44           9 :     st->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
      45           9 :     st->codecpar->channels       = 1;
      46           9 :     st->codecpar->sample_rate    = 8000;
      47             : 
      48           9 :     avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
      49           9 :     st->start_time = 0;
      50             : 
      51           9 :     return 0;
      52             : }
      53             : 
      54         610 : static int g723_1_read_packet(AVFormatContext *s, AVPacket *pkt)
      55             : {
      56             :     int size, byte, ret;
      57             : 
      58         610 :     pkt->pos = avio_tell(s->pb);
      59         610 :     byte     = avio_r8(s->pb);
      60         610 :     size     = frame_size[byte & 3];
      61             : 
      62         610 :     ret = av_new_packet(pkt, size);
      63         610 :     if (ret < 0)
      64           0 :         return ret;
      65             : 
      66         610 :     pkt->data[0]      = byte;
      67         610 :     pkt->duration     = 240;
      68         610 :     pkt->stream_index = 0;
      69             : 
      70         610 :     ret = avio_read(s->pb, pkt->data + 1, size - 1);
      71         610 :     if (ret < size - 1) {
      72          14 :         av_packet_unref(pkt);
      73          14 :         return ret < 0 ? ret : AVERROR_EOF;
      74             :     }
      75             : 
      76         596 :     return pkt->size;
      77             : }
      78             : 
      79             : AVInputFormat ff_g723_1_demuxer = {
      80             :     .name        = "g723_1",
      81             :     .long_name   = NULL_IF_CONFIG_SMALL("G.723.1"),
      82             :     .read_header = g723_1_init,
      83             :     .read_packet = g723_1_read_packet,
      84             :     .extensions  = "tco,rco,g723_1",
      85             :     .flags       = AVFMT_GENERIC_INDEX
      86             : };

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